Answer:
Option A. 3
Explanation:
we know that
The square has 4 equal sides
we have
2x-7 ----> equation A
3y-9 ----> equation B
y-1 ------> equation C
2y-5 ----> equation D
Find the value of y
Equate equation B and C or equation B and D or equation C and D
I choice equation B and C
3y-9=y-1
3y-y=-1+9
2y=8
y=4
Find the length of the square side
Substitute the value of y in equation B or C or D (the result must be the same)
equation B
3y-9
3(4)-9=12-9=3
therefore
The length side of the square is 3 units
Note The value of x does not need to be calculated